How do I revive my bartlett tree.

Hi Rojans,

When you say that the tree is 2 years old, I'm thinking you mean that you planted it 2 years ago, but it's really older then that. You don't say where you live and what the weather has been like and I'm wondering if there were drought or flood conditions over the winter.

Generally when I hear that a tree isn't doing well the first year or two after planting it's usually because it wasn't planted properly. It may have been planted too deep or have too much mulch on top of the roots or up against the trunk. Here's sites on how to properly plant, mulch and water trees so you can check to see if it was planted properly.
http://www.ext.nodak.edu/extpubs/plantsci/trees/f1147w.htm
http://www.ext.colostate.edu/pubs/Garden/07226.html
http://www.treesaregood.com/treecare/mulching.aspx
http://www.mdvaden.com/advice-landscape.shtml#wateringsuggestions

There is also something called pear decline. Take a look at these pics to see if any of the symptoms fit though you don't mention any discoloring or spots on the leaves last fall.
http://www.eppo.org/QUARANTINE/bacteria/Pear_decline/PHYP15_images.htm

Newt